The CBS Radio Mystery Theater (or CBSRMT) was an ambitious and sustained attempt in the 1970s to revive the great drama of old-time radio. Created by Himan Brown (who had by then become a radio legend due to his work on Inner Sanctum Mysteries The Adventures of Nero Wolfe and other shows dating back to the 1930s), it aired on affiliate stations across the CBS Radio network. The series began its long run January 6, 1974; the final episode ran December 31, 1982.
The show was broadcast nightly and ran for one hour, including news and commercials. Typically, a week consisted of three to four new episodes, with the remainder of the week filled out with reruns. There were 1,399 original episodes broadcast